A commit-msg hook written with bash to stop badly worded commits!

commit-msg.sh

#!/bin/sh
shopt -s nocasematch  # Case insensitive matching
shopt -s extglob

RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m'
regex='^(fix(es)?|change(s)?|merge(s)?|update(s)?|add(s)?|remove(s)?)[[:space:]].+[a-zA-Z?!${}()@].'

# Get commit Message
file=`cat $1`

# Test commit message conforms to regex requirements.
if ! [[ $file =~ $regex ]]; then
    echo "${RED} Commit messages must be prefixed with singular or plural fix, change, merge, add. \n Example 'Adds new API connection input to dash'"
    exit 1;
    else
    echo "${GREEN}Nice commit 👍 ${NC}"
fi